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Can't solve a linking error

Posted on 1997-02-26
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Last Modified: 2010-04-10
I am trying to link a whole series of files each with its own node (in Borland C++4.5).  There do not appear to be any errors in the code itself only in the linking.  The message I get is

   Undefined symbol arrayread(char far*, int) in module easywav2.cpp

I have only included the relevant parts of both of these files as they are quite long.  I have not even mentioned the word far in my definition.


#include <complex.h>
extern complex *arrayread (char *filename, int    num_elem);
int main()
{
...
...
complex *x;
char* filename;
unsigned int numpointsx;

cout << endl << "Filename?";
cin >> filename;
x = arrayread(filename, numpointsx);
....
....
}


The arrayread function is in a seperate node.

#include <stdio.h>
#include <stdlib.h>
#include <iostream.h>
#include <fstream.h>
#include <complex.h>

complex *arrayread (char *filename, int *num_elem)
{
      int i=0,j;
      complex *data;
      char buffer[10];
      double tempd;

      fstream file;
      file.open (filename, ios::in );

      while (!file.eof())
      {
            i++;
            file.getline(buffer,10);
            cout << buffer << endl;
      }
      file.close();
      file.open (filename, ios::in );

      data = new complex[i];
      for (j=0; j<i; j++)  // loop reads in data
            {
            file.getline(buffer,10);
            sscanf(buffer,"%lf",&tempd);
            data[j]=tempd;
            }
      file.close();

      *num_elem = i;
      return data;
}


I hope all the information that I have given is sufficient.  If you need any more then please let me know.
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Question by:DavidZ021497
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Accepted Solution

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edtmihu earned 50 total points
ID: 1162265
The function is implemented as :
complex *arrayread (char *filename, int *num_elem)
but refered to as :
extern complex *arrayread (char *filename, int num_elem);
the problem is the num_elem parameter.
Change the forward declaration to:
complex *arrayread (char *filename, int *num_elem);

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